Essays about: "Frequency Hopping"

Showing result 1 - 5 of 15 essays containing the words Frequency Hopping.

1. 1. LPI waveforms for AESA radar

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Andreas Sjöberg; [2020]
   Keywords : Radar LPI waveform AESA;

   Abstract : The purpose of low probability of intercept (LPI) radar is, on top of the standard requirements on a radar, to remain undetected by hostile electronic warfare (EW) systems. This can be achieved primarily by reducing the amount of radiated power in any given direction at all times and is done by transmitting longer modulated pulses that can then be compressed digitally in order to retain range resolution. READ MORE

3. 2. The Impact of Antennas on Radiolink Performance in Frequency Hopping Scenarios

   University essay from Uppsala universitet/Signaler och System

   Author : Sofia Bergström; [2018]
   Keywords : ;

   Abstract : This paper investigates how the communication performance of frequency hopping systems are affected by the antenna parameters. The data are generated from Antenna Toolbox in Matlab for the case of two dipole antennas is free space. READ MORE

4. 3. Cell Acquisition and Synchronization for Unlicensed NB-IoT

   University essay from Linköpings universitet/Kommunikationssystem

   Author : Eskil Jörgensen; [2017]
   Keywords : Narrowband Internet-of-Things; NB-IoT; unlicensed; cell search; cell acquisition; synchronization; artificial fast fading; binary sequences; peak sidelobe level;

   Abstract : Narrowband Internet-of-Things (NB-IoT) is a new wireless technology designed to support cellular networks with wide coverage for a massive number of very cheap low power user devices. Studies have been initiated for deployment of NB-IoT in unlicensed frequency bands, some of which demand the use of a frequency-hopping scheme with a short channel dwell time. READ MORE

5. 4. Performance Evaluation of 802.15.4 UWB PHY for High Speed Data Rate under IEEE Channel Mode

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Athanasios Vasileiadis; [2015]
   Keywords : Technology and Engineering;

   Abstract : In modern day society the increase of data generation and transfer has been an issue that researchers are working on. This generated and shared data might have a different purpose but one thing is certain, the reception. This communication can cover continents, countries, cities or even just a few meters. READ MORE

6. 5. Comparison of link layer of BLE and 802.15.4 : Running on Contiki OS

   University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

   Author : Prithviraj Narendra; [2014]
   Keywords : ;

   Abstract : There has been extensive research in the low power Wireless Sensor Network (WSN) community with 802.15.4 based platforms. A major factor for this is the support for 802. READ MORE